I used to love playing 45s at 33 1/3.
It made songs such as Like A Virgin sound like an old blues song. There is a particular artist with a penchant for the purp. Here's seven tracks I slooowed down then bumped the bass using Audacity. The effect makes for some coolass music tho here and there the effect sometimes make the vocals sound like he's got a head cold and has been chuggin' that drank.